package cn.edu.swu.bc.servlet;

import cn.edu.swu.bc.filter.AuthFilter;
import cn.edu.swu.bc.utils.DBUtils;
import cn.edu.swu.bc.entity.User;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.List;

public class UpdateUserInfoServlet extends HttpServlet {

    private static final long serialVersionUID = 11981254656534340L;

    private static final int MEMORY_THRESHOLD = 1024 * 1024 * 3;  // 3MB
    private static final int MAX_FILE_SIZE = 1024 * 1024 * 40; // 40MB
    private static final int MAX_REQUEST_SIZE = 1024 * 1024 * 50; // 50MB
    private static final String AVATAR_DIRECTORY = "avatar";

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
        this.doPost(request, response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {

        String nickename = null, signature = null, location = null, birthday = null, avatar = "null", sex = "1";
        // 配置上传参数
        DiskFileItemFactory factory = new DiskFileItemFactory();
        // 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中
        factory.setSizeThreshold(MEMORY_THRESHOLD);
        // 设置临时存储目录
        factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
        ServletFileUpload upload = new ServletFileUpload(factory);
        // 设置最大文件上传值
        upload.setFileSizeMax(MAX_FILE_SIZE);
        // 设置最大请求值 (包含文件和表单数据)
        upload.setSizeMax(MAX_REQUEST_SIZE);
        // 中文处理
        upload.setHeaderEncoding("UTF-8");

        // 构造临时路径来存储上传的文件
        // 这个路径相对当前应用的目录
        String uploadPath = request.getServletContext().getRealPath("./") + File.separator + AVATAR_DIRECTORY;
        // 如果目录不存在则创建
        File uploadDir = new File(uploadPath);
        if (!uploadDir.exists()) {
            uploadDir.mkdir();
        }
        try {
            // 解析请求的内容提取文件数据
            List<FileItem> formItems = upload.parseRequest(request);
            if (formItems != null && formItems.size() > 0) {
                // 迭代表单数据
                for (FileItem item : formItems) {
                    // 先处理文本内容
                    if (!item.isFormField()) {
                        System.out.println(item);
                        String fileName = new File(item.getName()).getName();
                        if (fileName.isEmpty())
                            continue;
                        String filePath = uploadPath + File.separator + fileName;
                        File storeFile = new File(filePath);
                        // 在控制台输出文件的上传路径
                        System.out.println(filePath);
                        // 保存文件到硬盘
                        item.write(storeFile);
                        avatar = "'" + fileName + "'";
                    } else {
                        if (item.getFieldName().equals("user[name]")) {
                            nickename = judgeIsNull(item.getString("UTF-8"));
                        } else if (item.getFieldName().equals("user[location]")) {
                            location = judgeIsNull(item.getString("UTF-8"));
                        } else if (item.getFieldName().equals("user[signature]")) {
                            signature = judgeIsNull(item.getString("UTF-8"));
                        } else if (item.getFieldName().equals("user[birthday]")) {
                            birthday = judgeIsNull(item.getString("UTF-8"));
                        } else if (item.getFieldName().equals("sex")) {
                            sex = item.getString("UTF-8");
                        }
                    }
                }
            }
            String sql = null;
            if (avatar != "null")
                sql = String.format("UPDATE users set nickname=%s,signature=%s," +
                                "location=%s,birthday=%s ,avatar=%s,sex=%s" +
                                " where uid =" +
                                request.getSession().getAttribute(AuthFilter.USER_ID), nickename, signature,
                        location, birthday, avatar, sex);
            else
                sql = String.format("UPDATE users set nickname=%s,signature=%s," +
                                "location=%s,birthday=%s ,sex=%s" +
                                " where uid =" +
                                request.getSession().getAttribute(AuthFilter.USER_ID), nickename, signature,
                        location, birthday, sex);
            System.out.println(sql);
            DBUtils.update(sql);
            updateHeaInfo(request.getSession());
            response.sendRedirect("./moreinfo.html");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    private void updateHeaInfo(HttpSession session) throws SQLException {
        User user= DBUtils.GetUser((Integer) session.getAttribute(AuthFilter.USER_ID));
        session.setAttribute(AuthFilter.USER_SIGNATURE,user.getSignature());
       session.setAttribute(AuthFilter.USER_AVATAR,user.getAvatar());
        session.setAttribute(AuthFilter.USER_NICKNAME,user.getNikcname());
    }
    //判断是否为空
    private String judgeIsNull(String s) {
        if (s.isEmpty()) {
            return "null";
        } else
            return "'" + s + "'";
    }
}
